Fix for twitter handles within parenthesis or brackets.

Author: gregjacobs

src/Autolinker.js

@@ -137,7 +137,7 @@
 		 *    This also includes a path, url parameters, or hash anchors. Ex: google.com/path/to/file?q1=1&q2=2#myAnchor
 		 */
 		matcherRegex: (function() {
-			var twitterRegex = /(^|\s)@(\w{1,15})/,                 // For matching a twitter handle. Ex: @gregory_jacobs
+			var twitterRegex = /(^|[^\w])@(\w{1,15})/,              // For matching a twitter handle. Ex: @gregory_jacobs
 
 			    emailRegex = /(?:[\-;:&=\+\$,\w\.]+@)/,             // something@ for email addresses (a.k.a. local-part)